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authorChristian Brauner <brauner@kernel.org>2023-01-13 14:49:11 +0300
committerChristian Brauner (Microsoft) <brauner@kernel.org>2023-01-19 11:24:02 +0300
commitc1632a0f11209338fc300c66252bcc4686e609e8 (patch)
tree0a17d3844bb4fbdabc565f022a8da3bed1fe361a /fs/libfs.c
parentabf08576afe31506b812c8c1be9714f78613f300 (diff)
downloadlinux-c1632a0f11209338fc300c66252bcc4686e609e8.tar.xz
fs: port ->setattr() to pass mnt_idmap
Convert to struct mnt_idmap. Last cycle we merged the necessary infrastructure in 256c8aed2b42 ("fs: introduce dedicated idmap type for mounts"). This is just the conversion to struct mnt_idmap. Currently we still pass around the plain namespace that was attached to a mount. This is in general pretty convenient but it makes it easy to conflate namespaces that are relevant on the filesystem with namespaces that are relevent on the mount level. Especially for non-vfs developers without detailed knowledge in this area this can be a potential source for bugs. Once the conversion to struct mnt_idmap is done all helpers down to the really low-level helpers will take a struct mnt_idmap argument instead of two namespace arguments. This way it becomes impossible to conflate the two eliminating the possibility of any bugs. All of the vfs and all filesystems only operate on struct mnt_idmap. Acked-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Diffstat (limited to 'fs/libfs.c')
-rw-r--r--fs/libfs.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/fs/libfs.c b/fs/libfs.c
index aada4e7c8713..0933726e3b6f 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -509,7 +509,7 @@ EXPORT_SYMBOL(simple_rename);
/**
* simple_setattr - setattr for simple filesystem
- * @mnt_userns: user namespace of the target mount
+ * @idmap: idmap of the target mount
* @dentry: dentry
* @iattr: iattr structure
*
@@ -522,19 +522,19 @@ EXPORT_SYMBOL(simple_rename);
* on simple regular filesystems. Anything that needs to change on-disk
* or wire state on size changes needs its own setattr method.
*/
-int simple_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
+int simple_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
struct iattr *iattr)
{
struct inode *inode = d_inode(dentry);
int error;
- error = setattr_prepare(mnt_userns, dentry, iattr);
+ error = setattr_prepare(idmap, dentry, iattr);
if (error)
return error;
if (iattr->ia_valid & ATTR_SIZE)
truncate_setsize(inode, iattr->ia_size);
- setattr_copy(mnt_userns, inode, iattr);
+ setattr_copy(idmap, inode, iattr);
mark_inode_dirty(inode);
return 0;
}
@@ -1324,7 +1324,7 @@ static int empty_dir_getattr(struct user_namespace *mnt_userns,
return 0;
}
-static int empty_dir_setattr(struct user_namespace *mnt_userns,
+static int empty_dir_setattr(struct mnt_idmap *idmap,
struct dentry *dentry, struct iattr *attr)
{
return -EPERM;